Pulverizer



c. J. TOMLINSO'N. I

PULVERIZER.

APPLICATION FILED DEC-22. I915- Patented Feb. 24,1920.

UNITED STATES PATENT OFFICE.

CLIEEORZD J'. TOMLINSON, OF WE S'J. ALLIS, WISCONSIN, ASSIGNOR TOALLIS-CHALMEBS MANUFACTURING COMPANY, OF MILWAUKEE, WISCONSIN, ACORPORATION OF DELAWARE.

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Patented Feb. 24,1920.

. Application flied December 22, 1915. Serial No. 68,932.

To all whom it may concern:

Be it known that I, CLIFFORD J. TOMLIN- SON, a citizen of theUnitedStates, residing at West Allis, in the county of Milwaukee andState of Wisconsin, have invented a certain new and useful Improvementin Pulverizers, of which the following is a specification.

This invention relates to improvements in the construction of impactpulverizers and especially to improvements in the construction ofhammers or bails for such pulverizers.

An object of the invention is to provide a pulverizer hammer or bailwhich is simple in construction, efficient in operation, and

1 in which the portion which is subjected to excessive wear may bereadily, removed and renewed. One of the more specific objects is toprovide a simple and strong hammer or bail comprising a pair of spacedradial arms and a cross-bar detachably secured to corresponding ends ofsaid arms. Another object is to provide simple and efficient means fordetachably securingthe cross-bar to the.

arm ends. A further object is to provide a suspension device for thebail, which will also serve to lock the means for securing the bail armsto the cross-bar, in place.

The present invention is an improvement over the device disclosed inapplication Serial No. 790,366, filed Sept. 15, 1913, which applicationclaims broadly some of the novel features shown herein.

A clear conception of an embodiment of the invention may'be had byreferring to the .drawing accompanying and forming a part of thisspecification, in which like reference characters designate the same orsimilar parts in the various views.

Figure 1 is a transverse vertical section through a rotary impactpulverizer having the improved bails applied.

Fig. 2 isan enlarged, part sectional elevation of one of the hammers 0rbails, showing the same secured to a fragment of the suspension means.

Fig. 3 is an enlarged end elevation of one of the hammers or bails.

Fig. 4 is a transverse section through the cross-bar of one of the bailsshowing also an elevation of one of the arms, the section I being takenalong the line IV-IV of Fig. 2.

The rotary impact pulverizer, see Fig, 1, comprises. 1n general aclrcular serles of rapidly revoluble radial hammers or bails suspendedfrom a shaft 2, and a main casing 1. The casing 1 is provided with afeed inlet 7 through which the material to be pulverized is deliveredinto the path of the revolving bails. The upper portion of the casing 1adjacent the path of the bails, is provided with liners 6 havinginvolute impact surfaces so located that they and has a suspensionmember 4: secured.

thereto by means of a key 3 or other suitable fastening device. Thesuspension member 4 has end surfaces 18 forming abutments spaced apartlongitudinally of the axis of rotation of the member 4. The hammers orbails are suspended from the mem ber 4 by means of pivot pins 5 whichare locked against end displacement by any suitable means such as setscrews 17, see Fig. 2.

Each of the hammers or bails comprises a pair of substantially radialarms 9. and a longitudinally recessed cross-bar 13. The innerextremities ofthe arms 9 are provided with-inner surface portions 19which cooperate with the surfaces 18 of the suspension member 4, toprevent displacement of. the arms 9 toward each other. The cross-bar 13is detachably secured to the outer enlarged, ends 11 of the arms 9, bymeans of projections 12 formed two on each arm 9 and extendingtransversely of the shaft 2. The rojections 1.2 form abutments facingthe shaft 2, which engage substantially parallel abutments orprojections 15 formed on'opposite sides of the longitudinal recess 14 ofthe cross-bar 13. The opposite ends of the cross-bar 13 are providedwith abutments or walls 16 the inner surfaces of which form stopsengageable with the outer surface portions 20 of the arms 9. Theenlargements 11 at the ends of the arms 9 provide the requisite strengthand increase to a maximum the surfaces of engagement between theelements.

In order to assemble a bail, the arms 9 are first secured to thecrossbar 13 by inserting the headed ends 11 in the central portion ofthe recess 14 and sliding the arms 9 over until their outer surfaceportions 20 engage the end walls 16. After the arms 9 have'been thuspositioned relatively to the cross-bar 13, their inner ends are arrangedwith the openings of the arms 9 in alinement with the adjacent openingin the suspension member 4 and with their inner surface portions 19adjacent the suspension member end surfaces 18, after which thesuspension pin 5 may be inserted and locked by means of the set screw17.

The insertion of the pin '5 positively locks the bail elements togetherand prevents displacement of the headed ends 11 of the arms 9 fromwithin the recess 14 of the cross-bar 13. It will be noted that theabutment surfaces 18 of the suspension member 4 positively preventdisplacement of the arms 9 toward each other while the abutments orwalls 16 of the cross-bar 13 positively prevent displacement of the arms9 away from each other. By providing two oppositely disposed likeprojections 12 on each of the arms 9 and otherwise symmetrically formingthese arms they are subjected only to forces acting radially of theshaft 2, thus avoiding bending strains on the arms such as might resultfrom unsymmetrical formation of the same. The provision of the recess 14and of a connecting means between the arms 9 and the cross-bar 13 lyingentirely within the said recess, effectively prevents injury of theconnecting means. The inwardly extending projections at the outerextremities of the arms 9 which overhan the suspension member 4:, formweights w ich when acted upon by centrifugal force prevent displacementof the outer extremities of the arms 9 away from the walls 16, therebyinsuring maintenance of the connections between the arms 9 and thecross-bar 13. The bail elements may be readily formed either by castingor forging and require very little finishing.

It should be understood that it is not desired to be limited to theexact details of construction shown and described, for obviousmodifications will occur to a person skilled in the art.

It is claimed and desired to secure by Letters Patent,

1. In combination, a suspension member rotatable about an axis andhaving abutment surfaces spaced apart longitudinally of said axis, apair of arms secured to said' member and radiating from said axis, eachof said arms being symmetrical with reference to a central planetransverse to said axis and said arms having inner portions cooperablewith said abutment surfaces to prevent displacement of said arms towardeach other, and a bar secured to and connecting said arms at theirextremities remote from said axis, said bar having inner rotatable aboutan axis and having abutment surfaces spaced apart longitudinally of saidaxis, a pair of arms secured to said member and radiating from saidaxis, said arms having inner portions cooperable with said abutmentsurfaces and said abutment surfaces constituting the sole means forpreventing motion of translation of sald arms toward each other, and abar secured to and connecting said arms at their extremities remote fromsaid axis, said bar having inner walls spaced apart longitudinally ofsaid axis and said arms having outer-side portions oooperable with saidbar walls to prevent displacement of said arms away from each other.

3. In combination, a suspension member rotatable about an axis andhaving abutment surfaces spaced apart longitudinally of saidvaxis, apair of arms secured to said member and radiating from said axis, saidarms having inner side portions cooperable with said abutment surfacesto prevent displacement of said arms toward each other, and a barsecured to and connecting said arms at their extremities remote fromsaid axis, said bar having inner walls spaced apart longitudinally ofsaid axis and said arms having outer side portions cooperable with saidbar walls, said bar abutments constituting the sole means for preventingmotion of translation of said arms away from each other.

4. In combination, a suspension member rotatable about an axis andhaving abutment surfaces spaced apart longitudinally of said axis, apair of arms secured to said member and radiating from said axis, saidarms having inner side portions cooperable with said abutment surfacesto prevent displacement of said arms toward each other and said armseach having an outer side portion and a pair of transverse projectionsat its extremity remote from said axis, and a bar having transverseprojections and inner walls spaced apart longitudinally of said axis,said arm projections being engageable with said bar projections tosecure said bar to said arms and said outer side portions of said armsbeing cooperable with said spaced bar walls to prevent displacement ofsaid arms away from each other;

5. In combination, a suspension member rotatable about an axis andhaving opposite surfaces spaced apart longitudinally of said placementof said arms toward each other and said arms each having an outer sidesurface and a pair of parallel transverse projections at its extremityremote from said axis, and a bar having parallel transverseprojectionsand inner surfaces spaced apart longitudinally of said axis, said armprojections being engageable with said bar projections to secure saidbar to said arms and said outer side surfaces of said arms beingcooperable with said spaced bar surfaces to prevent displacement of saidarms away from each other.

6. In combination, a cross-bar having a recess, an arm formed forattachment to said cross-bar Within said recess, said arm having a proectlon extending from one slde of said arm, and means for operating saidarm so that said projection aids in preventing releasing displacement ofsaid arm along said recess.

7. In combination, a cross-bar having a longitudinal recess therein, apair of arms spaced longitudinally of said bar and secured to said barWithin said recess, said arms having projections extending from saidarms on adjacent sides thereof, and means for operating said arms sothat said projections aid in preventing displacement of said arms alongsaid recess.

In testimony whereof the signature of the inventor is aflixed hereto.

OLIF F 0RD J. TOMLINSON.

